<template>
  <div class="home-category" @mouseleave="categoryId = null">
    <ul class="menu">
      <li :class="{ active: categoryId === item.id }" v-for="item in menuList" :key="item.id" @mouseenter="categoryId = item.id">
        <RouterLink to="/">{{item.name}}</RouterLink>
        <template v-if="item.children">
          <RouterLink v-for="sub in item.children" :key="sub.id" to="/">
            {{sub.name}}
          </RouterLink>
        </template>
        <span v-else>
          <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)"></XtxSkeleton>
          <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)"></XtxSkeleton>
        </span>
      </li>
    </ul>
    <!-- 弹层 -->
    <div class="layer">
      <h4 v-if="currCategory">{{currCategory.id==='brand'?'品牌':'分类'}}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <ul v-if="currCategory && currCategory.goods && currCategory.goods.length">
        <li v-for="item in currCategory.goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{item.name}}</p>
              <p class="desc ellipsis">{{item.desc}}</p>
              <p class="price"><i>¥</i>{{item.price}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌 -->
      <ul v-if="currCategory && currCategory.brands && currCategory.brands.length">
        <li class="brand" v-for="item in currCategory.brands" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="place"><i class="iconfont icon-dingwei"></i>{{item.place}}</p>
              <p class="name ellipsis">{{item.name}}</p>
              <p class="desc ellipsis-2">{{item.desc}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script setup>
import { computed, reactive, ref } from 'vue'
import { useStore } from 'vuex'
import { findBrand } from '@/api/home'

const store = useStore()
// 提前定义 品牌分类
const brand = reactive({
  id: 'brand',
  name: '品牌',
  children: [{ id: 'brand-children', name: '品牌推荐' }],
  brands: []
})
// 分类列表
const menuList = computed(() => {
  // 获取分类的一级分类 并只截取到2个二级分类
  const list = store.state.category.list.map(item => {
    return {
      id: item.id,
      name: item.name,
      // 防止没有children出现错误
      children: item.children && item.children.slice(0, 2),
      // 子商品
      goods: item.goods
    }
  })
  list.push(brand)
  return list
})

// 当前移入的分类
const categoryId = ref(null)
// 获取当前被移入的分类
const currCategory = computed(() => {
  return menuList.value.find(item => item.id === categoryId.value)
})

// 获取热门品牌商品
findBrand().then(data => {
  brand.brands = data.result.slice(0, 6)
})

</script>

<style lang="scss" scoped>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0,0,0,0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover,&.active {
        background: $xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255,255,255,0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
              width: 95px;
              height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: $priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
      li.brand {
        height: 180px;
        a {
          align-items: flex-start;
          img {
            width: 120px;
            height: 160px;
          }
          .info {
            p {
              margin-top: 8px;
            }
            .place {
              color: #999;
            }
          }
        }
      }
    }
  }
  &:hover {
    .layer {
      display: block;
    }
  }

  .xtx-skeleton {
    animation: fade 1s linear infinite alternate;
  }
  @keyframes fade {
    from {
      opacity: 0.2;
    }
    to {
      opacity: 1;
    }
  }
}
</style>
